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Proceedings Paper

Pointing, acquisition, and tracking architecture tools for deep-space optical communications
Author(s): Swati Mohan; Oscar Alvarez-Salazar; Kevin Birnbaum; Abhijit Biswas; William Farr; Hamid Hemmati; Shawn Johnson; Geraldo Ortiz; Kevin Quirk; Zahidul Rahman; Martin Regher; Farheen Rizvi; Joel Shields; Meera Srinivasan
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Paper Abstract

Deep-Space Optical Communications is a key emerging technology that is being pursued for high data-rate communications, which may enable rates up to ten times more than current Ka-band technology. Increasing the frequency of communication, from Ka-band to optical, allows for a higher data rate transfers. However, as the frequency of communication increases, the beam divergence decreases. Less beam divergence requires more accurate and precise pointing to make contact with the receiver. This would require a three-order-of-magnitude improvement from Ka-Band (~ 1 mrad) to optical (~ 1 urad) in the required pointing. Finding an architecture that can provide the necessary pointing capability is driven by many factors, such as allocated signal loss due to pointing, range to Earth, spacecraft disturbance profile, spacecraft base pointing capability, isolation scheme, and detector characteristics. We have developed a suite of tools to 1) flow down a set of pointing requirements (Error Budget Tool), 2) determine a set of architectures capable of meeting the requirements (Pointing Architecture Tool), and 3) assess the performance of possible architecture over the mission trajectory (Systems Engineering Tool). This paper describes the three tools and details their use through the case study of the Asteroid Retrieval Mission. Finally, this paper details which aspects of the pointing, acquisition, and tracking subsystem still require technology infusion, and the future steps needed to implement these pointing architectures.

Paper Details

Date Published: 6 March 2014
PDF: 11 pages
Proc. SPIE 8971, Free-Space Laser Communication and Atmospheric Propagation XXVI, 89710H (6 March 2014); doi: 10.1117/12.2042704
Show Author Affiliations
Swati Mohan, Jet Propulsion Lab. (United States)
Oscar Alvarez-Salazar, Jet Propulsion Lab. (United States)
Kevin Birnbaum, Jet Propulsion Lab. (United States)
Abhijit Biswas, Jet Propulsion Lab. (United States)
William Farr, Jet Propulsion Lab. (United States)
Hamid Hemmati, Jet Propulsion Lab. (United States)
Shawn Johnson, Jet Propulsion Lab. (United States)
Geraldo Ortiz, Jet Propulsion Lab. (United States)
Kevin Quirk, Jet Propulsion Lab. (United States)
Zahidul Rahman, Jet Propulsion Lab. (United States)
Martin Regher, Jet Propulsion Lab. (United States)
Farheen Rizvi, Jet Propulsion Lab. (United States)
Joel Shields, Jet Propulsion Lab. (United States)
Meera Srinivasan, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 8971:
Free-Space Laser Communication and Atmospheric Propagation XXVI
Hamid Hemmati; Don M. Boroson, Editor(s)

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